The Comparative Analysis :

BMW 640i Convertible xDrive Steptronic (13 - 14) vs. Porsche 911 Turbo Convertible S PDK (16 - 18)

€ 87,300
BMW 640i Convertible xDrive Steptronic (13 - 14) BMW 640i Cabrio
€ 218,200
 Porsche 911 Turbo Convertible S PDK (16 - 18) Porsche 911 Turbo Convertible S
€ 87,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 218,200

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The BMW 640i Cabrio is considerably bigger in every dimension. It's 15.2 inches longer, 0.6 inches wider and 2.8 inches taller than the Porsche 911 Turbo Convertible S.
BMW 640i Cabrio
Porsche 911 Turbo Convertible S
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
74.6
81.9
50.9
Blueprint Porsche 911 Turbo Convertible S PDK (16 - 18)
74
77.9
74.6 in
Width
74 in
81.9 in
Width Incl. Mirrors
77.9 in
53.7 in
Height
50.9 in
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
112.4
192.7
Blueprint Porsche 911 Turbo Convertible S PDK (16 - 18)
96.5
177.4
192.7 in
Length
177.4 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
4376 lb
Curb Weight
3847 lb
5291 lb
Gross Vehicle
Weight
4508 lb
BMW 640i Convertible xDrive Steptronic (13 - 14)
Weight Difference:
529 lb
12.09 %
Porsche 911 Turbo Convertible S PDK (16 - 18)

General

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
F12
Generation
991
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Permanent all-wheel drive (AWD)
Drivetrain
Permanent all-wheel drive (AWD)
8-speed automatic transmission
Transmission
7-speed dual clutch transmission

Engine

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
Straight-six gasoline engine with tur­bo­charger
Engine Type
6-cylinder boxer gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3.8 L / 186 cu in
316 hp
at 5800 rpm
Power
572 hp
at 6750 rpm
BMW 640i Cabrio
316 hp
572 hp
Porsche 911 Turbo Convertible S
332 lb‑ft
at 1300 rpm
Max. Torque
516 lb‑ft
at 5600 rpm
BMW 640i Cabrio
332 lb‑ft
516 lb‑ft
Porsche 911 Turbo Convertible S

Performance

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
155 mph
Maximum Speed
205 mph
5.4 sec
Acceleration 0 to 62 mph
3 sec
62 mph 62
mph

246 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

138 ft
0.000 sec

Porsche 911 Turbo Convertible S

▶ REPLAY
13.85 lb/hp
Weight-to-Power Ratio
6.73 lb/hp
BMW 640i Cabrio
13.85 lb/hp
6.73 lb/hp
Porsche 911 Turbo Convertible S

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
Fuel Economy
29 mpg
combined
25 mpg
BMW 640i Cabrio
29 mpg
25 mpg
Porsche 911 Turbo Convertible S
21 mpg
city
19 mpg
No data
highway
31 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
18 gal
Kraftstoffanzeige
531 mi
Range
454 mi
BMW 640i Cabrio
531 mi
454 mi
Porsche 911 Turbo Convertible S
Environmental Impact
155.3 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
176.2 kWh
BMW 640i Cabrio
155.3 kWh
176.2 kWh
Porsche 911 Turbo Convertible S
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
309 g/mi (NEFZ)
CO2 Emissions
348 g/mi (NEFZ)

Practical Convenience

BMW 640i Cabrio
Porsche 911 Turbo Convertible S
2
Doors
2
4
No. of Seats
4
915 lb
Maximum Payload
661 lb
9.9 cu ft
Trunk Volume
3.3 cu ft
No data
Cargo Volume (Seats Down)
No data